Improvement in surfacing stone



JIM. POOLE. stmmcme STONE.

No. 194, 7 Patentd Sept. 4,1877.

FFICE.

J. MORTON POOLE, OF WILMINGTON, DELAWARE.

IMPROVEMENT IN SURFACING STONE.

Specification forming part of Letters Patent No. [94,879, datedSeptember 4, 1877; application filed February 25, 1876.

To all whom it may concern Be it known that I, J. MORTON POOLE, ofWilmington, Delaware, have invented a Machine for Surfacing Stone, ofwhich the following is a specification:

The object of my invention is to construct a machine for surfacingmarble and other stone by means Oran-emery "6r corundum wheel and areciprocating bed, so that by the aid of a jet or jets of water, asdescribed hereinafter, the surface of the marble will have acquired sucha finish as to require but little subsequent polishing.

As illustrated in the accompanying drawing, the frame-work of themachine is constructed like an ordinary metal-planing machine, A beingthe reciprocating bed adapted to ways in the base B, D, and D, theopposite frames carrying the vertically-adjustable cross-head E, towhich is adapted the horizontally-adjustable slide F, having thevertical slide G, on which are two projections, a a, each of the latterhaving a set-screw, b.

The points of the two screws carry a spindle, d, to which is secured thecutting-wheel H, the latter being caused tomve at a high velocity, inthe present instance, by a belt passing round a pulley on the spindle.

A pipe, 00, for supplying jets of water on each side of thecutting-wheel, projects down on each side of the cross-head E. One jetof water, however, will suffice in some instances.

For operating on comparatively soft stones, the cutting-wheel mayconsist of the composition known as vulcanite emery, 0r granulatedquartz may enter into the composition of the wheel; but for stones ofharder kinds the wheel should be composed of granulated corundum,incorporated and intimately mixed with any solidifying substances ofsuch character that the composition will constitute a cohesive mass,capable of resisting the action of water, and so retaining the particlesof corundum that the latter are presented in the condition of amultitude of small cutters adher ing to and partly projecting from thewheel.

The slab I, of marble or other stone, having been secured to the bed A,and the slide G adjusted in accordance with thedepth of the cut to bemade, the cutting-wheel is caused to revolve at a high velocity, whilethe bed A moves slowly. After one out has been made by the periphery ofthe wheel, the slide D is adjusted laterally, so as to bring the saidwheel in a proper position for making a second out, after which the bedis reversed, the wheel continuing to revolve in the same direction, andthis reciprocation of the bed and lateral adjustment of the wheel arecontinned until the stone has been reduced to the ,d s red surface- Itis essential that a plentiful supply of water should be directed,preferably at both the front and rear of the wheel, to that part of theperiphery of the same which acts on the stone-hence the pipes 00, whichterminate in nozzles turned in the proper direction, and which arecarried by the slide G, so that whatever may be'the position of thewheel, as determined by the adjustment of the slides, the jets of waterwill always be directed to the proper points.

I do not desire to claim, broadly, the combination of a reciprocatingbed with a rotating grinding-wheel admittingof both lateral and verticaladjustment; nor do I claim, broadly, the conveying of water to agrinding or polishing wheel; but

I claim as my inventi0n A stoneiafling machine in which are combined thefollowing elements, namely, a reciprocating bed to which the stone issecured, a corundum or emery wheel, the slides F and G carrying the saidwheel, and a pipe or pipes, 00, carried by the said slide G, andterminating in a nozzle or nozzles directed to that,

portion of the periphery of the wheel which acts on the stone, allsubstantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J. MORTON POOLE.

SAML. MURPHEY, Jr.

